Every boater on your holiday list must comply with U.S. Coast Guard safety requirements. Give them the SOS Distress Light that is safer than flares and safe for the environment. They will NEVER HAVE TO BUY FLARES AGAIN. This electronic flare never expires. Only one per boat required. Operates on 3 C-cell batteries. Visible to 10 nautical miles. Flashes SOS signal up to 60 hours. Made in USA. weems-plath.com